Shanghai authorities have guaranteed the quality ofthe city’s drinking water _____ more than 7500 rotting pigs ______ floating onthe Huangpu River in the past week

The manager demanded that the data referred to in his report ______ to Mr. Andrew without delay.[ ]

Mom, shall we have supper now—Oh, we won’t have supper ______ your dad comes back.

He was the last man I wanted to meet, but I managed to smile at him

My mother wants me to be _____ office worker, but I would like to be a volunteer towork for ______old people.